Verifying configuration parameters  Configuring the Veritas subsystem for Sybase Failover

Chapter 13: Configuring Adaptive Server for Failover on Veritas 3.5 and 1.3

Adding thresholds to the master log

Failing over, failing back, creating proxy databases, and so on, are log-intensive activities. If you do not have adequate log space, any of these activities can fail. If you have not already done so, you must add a threshold to the master log.

  1. Define and execute sp_thresholdaction on the master database’s log to set a threshold on the number of pages left before a dump transaction occurs. Sybase does not supply sp_thresholdaction. See the Adaptive Server Reference Manual for information about creating this system procedure.

  2. Place thresholds on the master log segment so it does not fill up:

    sp_addthreshold "master", "logsegment", 250, sp_thresholdaction
    
  3. Restart the primary companion for this static parameter to take effect.





Copyright © 2005. Sybase Inc. All rights reserved. Configuring the Veritas subsystem for Sybase Failover

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